DeBash - debugging Shell Scripts

#!/usr/bin/env python

import sys

filename = "FILE0"
funcname = "FUNC0"
start_writren = True


if len(sys.argv) < 2:
    print "ERROR: NO FILENAME DIVEN!"
else:
    inputFile = open( sys.argv[1], "r" )
    filename = sys.argv[1]
    sourceArray = []
    for line in inputFile:
        sourceArray.append( line )
    print "EXEC: Read done."

# print sourceArray
    if (len(sys.argv) == 3):
        destFile = open(sys.argv[2], "w")
    else:
        destFile = open(sys.argv[1], "w")

    sourceArray[0] = "%s %s" % (sourceArray[0], 'echo "Entered[%s]" >> /tmp/wisc.log\n' % (filename))
    for line in sourceArray:
        # hard
        if(line.find("()") != -1):
            funcname = line[0:line.find("()")+2]
            start_writren = False


        if(line.find("{") == -1 and line.find("}") == -1):
            destFile.write(line)
        else:
            if(line.find("{") != -1 and line.find("}") == -1 and start_writren == False): # found only for the first time{
                destFile.write(line)
                destFile.write('\techo "[%s]:[%s]:[%s]" >> /tmp/wisc.log\n' % (filename, funcname, "start") )
                start_writren = True
            elif(line.find("{") == -1 and line.find("}") != -1 and line == '}\n' ): # found only }
                destFile.write('\techo "[%s]:[%s]:[%s]" >> /tmp/wisc.log\n' % (filename, funcname, "end") )
                destFile.write(line)
            else:
                destFile.write(line)
        #   hard done
    destFile.write('echo "Exited[%s]" >> /tmp/wisc.log\n' % (filename))
    print "EXEC: Write done."